Finding the Fourth Proportional to 42,833.70, 64,217.61 and 21,756.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,833.70 : 64,217.61 = 21,756.42 : x
2. Step 2: Convert to fraction form
   42,833.70/64,217.61 = 21,756.42/x
3. Step 3: Cross multiply
   42,833.70x = 64,217.61 × 21,756.42
4. Step 4: Simplify right side
   42,833.70x = 1,397,145,294.56
5. Step 5: Solve for x
   x = 1,397,145,294.56/42,833.70
6. Step 6: Final answer
   x = 32,617.90